Previously, the handler would load the constant field from the holder
everytime by using the descriptor index. Instead, this patch inlines
the constant field directly into the handler.

Change-Id: Ia731811b135897033f4c5dc973031a30f25a64ed
Bug: v8:9616
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1688829
Commit-Queue: Sathya Gunasekaran  <gsathya@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63332}